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https://issues.apache.org/jira/browse/HADOOP-1532?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12508605
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Senthil Subramanian commented on HADOOP-1532:
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Looked at HADOOP-1134 and also discussed with Milind about DFS improvements
that are going to be in 0.14. Neither "verify long" nor "verify quick" would be
needed once we are on 0.14.
> Distcp should support verification modes
> ----------------------------------------
>
> Key: HADOOP-1532
> URL: https://issues.apache.org/jira/browse/HADOOP-1532
> Project: Hadoop
> Issue Type: New Feature
> Components: util
> Reporter: Senthil Subramanian
> Fix For: 0.14.0
>
>
> distcp doesnot currently support any verification after copying files. It
> should support
> 1. verify quick (vq) mode - which compares the source and destination CRCs
> 2. verify long (vl) mode - which in addition to verify quick should read the
> entire destination file to catch DFS block level errors
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